How to make a python number from a line

Convert strings to numbers in Python with an example: int("3") to get 3, float("3.14") to get 3.14.

Creating a Python Number from a Line of Text

It is possible to create a Python number from a line of text. To do this, you need to first convert the text into a number by using the int() or float() functions. You can also use the eval() function to evaluate a string as a Python expression.

For example, let's say you have the following line of text:

text = '4.5'

You can create a float number from this line of text by using the float() function:

number = float(text)

This will result in the number 4.5 being stored in the number variable. You can then use this number in your Python code, for example:

# Calculate the square of the number
square = number * number

# Print the result
print(square)

This will print out the result of the calculation, which is 20.25.

It is also possible to directly evaluate a string as a Python expression using the eval() function. For example, the following will evaluate the string '4.5 * 4.5' and print out the result:

# Evaluate the string as a Python expression
result = eval('4.5 * 4.5')

# Print the result
print(result)

This will print out the result of the calculation, which is 20.25.

As you can see, it is possible to create a Python number from a line of text using the int(), float(), or eval() functions. This can be a useful way to convert user input into a Python number that can be used in your code.